Drier



INVENTOR 62%; a 5 @udaa W 20M; ATTORNEY5 3 Sheets-Sheet 1 DRIER C- DU B.ARCULARIUS Sept. 12, 1950 Flled May 22, 1948 Sept 1950 c. DU 5.ARCULARIUS 2,521,769

DRIER 3 Sheets-Sheet 2 Filed May 22, 1948 INVENTOR 4M; ah/F. 4204a;

' ab-z mflwn ATTORNEYS c. DU B. ARCULARIUS DRIER s shets sheet 3 FiledMay 22, 1948 INVENTOR 41M; 2'. 5. @w am BY 2.4.; @MM 1 M ATTORNEYS iii,

members I3a.

screen is insulated from the frame and, for this purpose, the ends ofthe rod IIa are journalled in blocks I9 of insulation mounted on frameabuts insulating stops extending inwardly from the reflector near itsouter edge and is held in that position by an arm 2I attached to thebarrel of a lock 22 and movable by rotation of the barrel thro ugh aslotin the reflector to overlie a stop fiion} a cover Z4. The lock: ismounted to extend through the screen and is insulated therefrom.

The cover is formed of metal or other suitable material and it extendsoutwardly from the sides and top of the wall plate and down to the frameIn closed position, the screen I formed by bars I3, I311, I31). Thecover is provided with cleats 25 on its inner. surface at"the =1 top,which are receivable in openings in spring holders 26 attachedto theouter face of the wall plate Ill. The lower edge of the cover lieswithin the vertical flanges of the'b'ars I31 I3b'anditf is prov'idedwitha molding 2101'1 its outer 'siii face, which rests on top of thoseflanges? In v order "to remove the cover, a key is inserted-in lock 22and the barrel of the' lock turrfed'wflmove ar ri free OI StOUZ-S andoutofthe not-immereflec'tonafter which the cover may be"raised with thecleats 25 slipping out of the holdr's'fifif The screen'IT ma be releasedands'wung down- Wardly 'to' afford access to the interior of t ereflector without emoval of thec'overl lower 28 rnou "ite'd OnipIa'te-ZS attached to one flange of the middlechan nei member I2? and theblower "is driven by an electric motor '33 attachedthereto;'The'--blower"oiitlet is provided with a nozzle 3|, which extendsge'herahy; downpart ofthe resonant receiver fcire'uitflfi, 50, d h tev.ia ia q a a e of a d ng a pacity'to the circuit'is broughtinto pro'gimit to the, screen, themcircuit is'detuned. ThusQ When wardly throughan opening in thejto'p of gen-est means, is mounted on: top of. the,floor; plate. I4, near the wallsplate lli, Upon remo. .al cover, thechassis may beremoy'ed e dwise K 1Q The drieri describ'e'd is intendedfor 'a er t c a d h wir d a r m is} ;6.; The unit includes an oscillatortubefiil a; receiver, tube AI, als ensitive relay .42, alpower, re,- lay43; a plate supply rectifier- 4t, and an. an; tenna, which in this case,is the screen I-I. oscillator tube is provided with agridflealg 45 anda: condenserfifi, and an inductance coil il and al condenser 4jtserve as]the tuned circuitfor d etermining ithe oscillatorfrequency. r {TheeoilAIis coupledrinductively to coil 49 in the'eircuit of the. receiveritube l I rand the receiver circuit is tuned;

- to the frequency of the-oscillator by condensers;

50, '5 I Condenser '5 I5 is small compared to, con

4 developed across resonant circuit 49, 5D, 5 I. Grid leak 53 isconnected between the grid and cathode of tube 4|, causing the grid tobe at cathode potential, if no alternating current potential isimpressed upon the grid., When alternating voltage is applied to thegrid; grid current will flow on the positive portions of, thealternating current cycle, producing a negativev charge across condenser52, which in t urn provides a negative :gri debias [on the grid of}tubeifl 'Accordingly, the grid-bias varies directly with the; voltage-;across the resonant circuit 49, 50, 51 and the plate current of tube4| varies inversely with that volt- "age.

;- .,.;The sensitive relay 42 is adjusted to operate on the averageplate current of tube 41, when that Jtube isoperating at or near zerogrid-bias, and,

if, the plate current falls much below that for zero grid -bias, thesensitive relay will be inoperative. Ascprd n a a 1 te to em ninrerative so long asthe'resonant circuit 19; 51.}, '5 If re cay nneproper alternating voltage frorn'tube' 40 ibutfif the yoltage acrossfthefresonarit circuit i redu'cd ,t 'alssm 'l x va relay 42 llp tief QRela y lz operates relay 43 directly from, power su p liq t li l es 4;5.5- h n" 1 24 115 cr at d, 'i *'c r t ithei in ow iling? 1 30 heatingelements 3;}, and lamps38 Th e screen I I [is connected to the junctionbe-1 tween condensers 50, 5 I and is insulated'froni the" framework ofthe apparatus; .1 The screen is thus t e rat s) a y t e tpar t bo' 'ycome. into proximity to the-screen, mad an is neg; tuned by theadditional capacityto-grou I introd The; Id t ni o t c ercirw i huscausesa reduction in the alternating voltage ap-f plied to the grid oftube "4] andthe plate a res denser 50 and is variable 50 that, by itsuse, the

erationof relay fl -causes relay 43'to operate the {result that currentis supplied to the motor, heating elements, and lamps,

additionito the SCI, an electrode Ii as ent; ing the controlelement forthe motor heater ele-l;

nie nts lampsQitprOtectsthe user of the drier fron injury throughcontact with the heater clef? control unit may be operated from eitherA, C. or

D,-; C., since no transformers are employedff The cathodes of the vtubes4i] and V I I L are grounded through condenser 59toprovide morestable opcit t n-zip type bumr desired, i t' may be modified termin l} starting-and automatic shutoff For this .p r51 pose,- theadrier maybe equippedwiththecircuit showntin Fig- 7, whichincludes a push button switch ;60,: mounted at i any convenient place and, preferably, in an opening in.the front of the covefn The circuit also includes1a relay 1, Which is'lclosed: by piower =supplied from power lines 5 41', ssg when the bh tbn;isi r s ed, {and 1a trier 9 v statically operatedjswitch 62,;jwhichisnol s d a i @P n' 'jr; t ehi 1 has th ou its hea e 2 1. a for i ec i Whenrelay BI is closed; it closes' contacts" and I extend, perforateconductive meansyiclosing the: front of-the reflector and movable toafford access to the source and elements, means 1 for lock:-

' ing-the perforate means imposition, switch means for connecting theblower motor, heating-elemerits, and infrared sour'ce to a source of,energy,:

and control means, including a circuit contain-;

ing said perforatemeans, for operating the switch to connect the sourceof energy-tothc, motor, elements-and infraredsource whenever an articlecapable ofadding? capacity to said circuit is brought into proximityitosaid perforate 'means.

7. Inga drier, the-combination of a support,a motor-drivenblower mountedon thesupport; a nozzle attached "to thesupport and directing air,issuing therefrom as a blastiina generally downward direction,elcctrical:, elements; mounted on- 1 the nozzle for heating theblast, asourcez of in: 1 frared rays mounted on 'the Support adjacent thenozzle, aconcave refiectormounted on the support with its concavesurface facing-downmamas g means toa source of electrical energy; .andcona trol means including a circuit containing an elecetrode element foroperatin the 'switchjwheng-i ever capacity is added to .the circuit,saidelec-z trOdQmlement [being interposed in the'path 101a blast fromthe nozzle, whereby the bringingof I anarticle tobejdried'capableofaddingcapa'city tothe circuit in "the path ofzthe' blast andinproximity to said element will 'operate the switch? blower motor and theheating to energize the means; J1" 10.- Ina drier, thecombinationyofa'support a motor-driven lblower mounted on the -support, a

., nozzle attached to the blower andxdirecting air issuing therefrom asa blast, electrical heatingmeans mounted in the path, of the: iblast forheating the blast as it passes thereover, switch means for connectingthe blower motorand heat-1' ing meansito a source of-electrical energy,and

control-means,including a circuit-containing a protective screenelectrode positioned in front of tective screen electrode, I

elements, andinfrared source to a source of en,

ergy, and control means, includinga circuitconw taining said perforatemeans, forbausingthe switch means to connect the source of energy to themotor, elements, and infrared source when ever an article capable ofadding capacity to the circuit is brought into proximityto saidperforate means. I M v 8. In a drier, motor-driven blower mounted on thesupport, a nozzle attached to'the-blower and directingair issuingtherefrom as a blast, electrical heating means mounted in thepath oftheblastfor heat ing the blast as it passesthereover, switch means forconnectingthe blower: motor and heating means to a source ofjelectricalenergy, and control means, including a ,circuit; containing an electrodeelement for operating the switchwhenever capacity is added to thecircuit, saidgopere ating element having at least oneopening. and beingso mounted with respect to the nozzle that ablast from the blower willpass through said opening, whereby the bringing offan article to bedried capable of adding capacity to the circuit in the path of the blastand-in proximity tosaid electrode element will operate the switch toenergize the blower motor andthe heating means 9. In a drier, thecombination of a" support, a motor-driven blower mountedon the supportyanozzle attached to the blower and directing air issuing therefrom as ablast, electricalheating means mounted in the path of the blast-for,heating the blast as it passes thereover, switch means for'connectingthe blower motor and? heating the combination of a saw, a

the heating means and in the path of a blast fromthe nozzle foroperating theswitch'when ever an article capable of adding capacity-tothe circuit is brought into proximity to said proe 11. In a drier, thecombination or}; support, a motor-driven blower mounted on the support,a

nozzle attachedto the blower-and directingair issuing-therefrom as ablast, electri-calheating means mounted in the path of ablast from saidnozzle, for heating the blast, a source of infra red rays mounted on the*supDOrt 1 adj acent' the nozzle, switch meansfor connecting the blowerment for operating the switch whenever capacity is added to-the circuit,said operating electrodeelement 4 having at least one opening andbeingsomounted with respect to'the nozzle that a blast from the blowerwill pass through said Welling whereby the bringing of an article to bedried capable of adding capacity to the circuit in:

the path ofthe blast and in proximity itosaid element will operate theswitch to'energiz'e the blower motor, the source of infra-redrays andmeans,

' CHARLES DUB. ARCULARIUS.

REFERENCES CITED 'The following' references are of'record inthefileofthis patent: I T

the heating 2,278,130 Goldstine Mar; 31,1942

